NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2017-08-02 825-580 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2017-08-02 825-588 not yet reported which blocks → TELUS Mobility 8301 Edmonton —
2017-08-02 838-200 0–9 XXXall 10 · 4 holders which blocks → TVC ALBANY, INC. DBA FIRSTLIGHT FIBER 7989 ALBANY NY
2017-08-02 984-287 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 DURHAM NC
2017-08-01 201-551 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 JERSEYCITY NJ
2017-08-01 325-225 0–9 XXXall 10 · 6 holders which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 CLYDE TX
2017-08-01 405-746 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 SEMINOLE OK
2017-08-01 575-552 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NM 206F HOBBS NM
2017-08-01 639-323 not yet reported which blocks → Bell Mobility 6574 Cabri —
2017-08-01 639-324 not yet reported which blocks → Bell Mobility 6574 Central Butte —
2017-08-01 661-405 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LANCASTER CA
2017-08-01 719-341 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 ALAMOSA CO
2017-08-01 719-733 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 PUEBLO CO
2017-08-01 806-405 0XXX1XXX2XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 LAMESA TX
2017-08-01 870-205 0–9 XXXall 10 · 5 holders which blocks → E. RITTER COMMUNICATIONS, LLC 128L PARAGOULD AR
2017-08-01 979-205 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM SUGAR LAND, LLC 2147 SWEENY TX
2017-07-31 312-581 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2017-07-31 431-541 not yet reported which blocks → Bell Mobility 6574 Brandon —
2017-07-31 571-324 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2017-07-31 581-775 not yet reported which blocks → Videotron Ltd. 8306 St-Methode-de-Frontenac —
2017-07-31 581-776 not yet reported which blocks → Videotron Ltd. 8306 Saint-Magloire —
2017-07-31 587-942 not yet reported which blocks → Bell Mobility 6574 Calgary —
2017-07-31 720-602 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2017-07-31 916-301 0–9 XXXall 10 · 4 holders which blocks → ASTOUND BROADBAND, LLC - CA 485E RSVL CTHT CA
2017-07-28 213-302 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 10 CA
2017-07-28 518-617 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CAIRO NY
2017-07-28 603-299 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BARTLETT NH
2017-07-28 626-366 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-07-28 845-390 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 SUFFERN NY
2017-07-28 909-408 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D ONTARIO CA
2017-07-28 937-500 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 HILLSBORO OH
2017-07-27 562-359 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DOWNEY CA
2017-07-27 628-219 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2017-07-27 646-818 0–9 XXXall 10 · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-07-27 717-996 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J HARISBGZN1 PA
2017-07-27 813-836 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 PLANT CITY FL
2017-07-26 276-265 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 JONESVILLE VA
2017-07-26 517-273 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E HOWELL MI
2017-07-26 581-800 not yet reported which blocks → Iristel Inc. 154E St-Felicien —
2017-07-26 717-995 0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 HERSHEY PA
2017-07-26 778-507 not yet reported which blocks → TELUS 8086 North Vancouver —
2017-07-26 778-948 not yet reported which blocks → TELUS 8086 Port Moody —
2017-07-26 825-201 not yet reported which blocks → TELUS 8084 Edmonton —
2017-07-26 825-202 not yet reported which blocks → TELUS 8084 Edmonton —
2017-07-26 825-203 not yet reported which blocks → TELUS 8084 Edmonton —
2017-07-26 920-396 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREEN BAY WI
2017-07-25 207-405 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - ME 454F PORTLAND ME
2017-07-25 312-579 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2017-07-25 318-589 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ALEXANDRIA LA
2017-07-25 343-228 not yet reported which blocks → TELUS Integrated Communications 2782 Denbigh —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.